A cobpohation



July 31, 1923.

E. E. HEINTZ wnww REGULATOR Filed Abril 27 1921 2 Sheets-Sheet 1 m .7 A m m gkwmsrl'. Han/r1 ,1 TTORNEY.

July 31, 1923 E. E. HEINTZ W I NDOW REGULATOR Filed April 27 1921 2 Sheets-Sheet 2 ATTORNEY.

, -1'o utlwhomit may This invention relates Patented July 31, 1923.

nmwsr n. zimn'rz, or nnivitorr, MICHIGAN, nssmnon -'ro runng'oi COMPANY, or. nm'noxr,

mmm mun.

. v k l nxcnmm, A conronn'rzon or moment,

wmnow REGULATOR.

Application mea's ru'zr, 921. serial No. (seam Be it known that I ERNEST EQ Hnm'rz, a

citizen of the United States, residin 'at De troit, in the county of lVayne and tate -of vMichigan, have invented certain new and useful Improvements in Window 'Regulators; of Which-the following is a specification.

tors. In certain types of window regulators it ispossible to continue the rotation of the crank handle-a short distance after the windon has reached the bottom of the window Well.

ofthis type when the clutch locks immediately the turning effort is released-upon the crank' handle. an objectionable slack occurs in the'chain. Itis'the object of the present invention tocoqrdinate the action of al naturally quick acting clutch with-the chain tensioning spring so that the clutch 'locking is delayed "until after the chain ten- 'sioning chain.

- 'To be morespeeific, such a window" shown in the drawings of regulator as is thiscase and claimedinthe prior Allmand and Lawrence. Patent No.

'upon a slidable bearing. This lower sprocket'is norn ally' pro ected outwardly by. a coiled 5 ring, the'reb chain taut. strikes'the stop dow well.- may continue the turning 'ofthe crank until he can turn it no' further. .The

y keeping the e window in its descent at. the bottom o'fthe. winmg noises. .It is the, object-eitheis released on the he ndle the chain'tensioning spring will beat 'the revisedv clutch ac tion and force the chain back to normal position before. the clutch'locks.

to window regula- 'POSItIOfl. 'It

In some window regulators 4 n movable sprocket bee spring takes the slack out. oj the.

.t'r'act fromfth v ment, for it: 1,317,150'of Sept. 30, 1919, .the lower spmnket is supported" s1tion.i

:havejclai 'aninde vwith apparatus'pther The-operator not seeing this turning 1 --8l'l58, for instance, of the crank handle after the window strikes ed in thiveondition with I forth :With the vibration of the car,'resulting-in annoya plds'entw invention to make this result impossible be- ;cause' by the delaying devices enigiloyedigi the present clutch whentheturningeiforti There are some types of clutehes'in "which to its natural position he looks. There are other clutches which dg no; positively loelr s3 'honeefthe c' ain nsionin s r'i ma enough to 178G151! isthe merit of the" w vention that recognitionie-tm' problem of slack chain fid th lt'it is'idlie td premature "clutch-locking in n window Mgulator having a chain-'telgsiom'n 2 e invention is to a p y a? tiv" remedy by addinganel ment-te die b1nation that properly l covgrdinalies' he action; This ectionable chainsslaeli of clutches (16311 able for other reasons, which if left uncon-- trolled will inevitably produce-chain slack. fact they, the problem does not arisd with ,nertam types ei clutch, doesnot ep anq lei e impo it fierzmts the -use efylut!iliee;ith;et "are 1110183 ".In a c {pen g'a 1atie1iNol5S8 1 ed iiliiemt ii pezse. r iseliig hn pendent invention as'it might be used than window re Ia flfld lt would be useful; with windowegnlatgrs, where the present roblem does not awindow regulator with a screwa l ustment for the lowersprocket or no ad ustmentat all. van in such a surrounding the clutch with theyieldnhle dur ng plates has a useful function, to-w'it': the Ymldableydrifing lates take; up the lost n'iotio'n invthehm ei'ind hence avoid yibration of the" hmdlelgwi'sich is. otherwise inevitable with ball ty e of clutch. On the-other hand the broa combination, wh ch ia;elaimecl in the present application might 'be achiered by quite .iiifierent-indi=- vidnel -elementsthanfthose that hap be shown, for instance a of clutch might lock in pawlor too ty advance of the re-' useful results'aebieiedj plym' 1a motive-in the. ivaypi-EF gerl'y te ding device. 2

fore .the clutch do object of)? permits the'g. use, 1 without i1:

Ion

Ieaseoftlw slackimthe chain and thesamm In the drawings,-

Fig. 1 is a side elevation showing the window regulator attached to the lock-board.

Fig. 2 is a section on the line 2-2 of Fig. 4.

- Fig. 3 is a side elevation showing the side of the window regulator opposite to that shown in. Fig. 1.

Fig. 4 is a side elevation partly-in section but taken at an angle of ninety degrees from the showing in Fig. 3.

Fig. 5 is a detail view of the clutch with the retarding plates removed.

Fig. 6 is a view of the clutch with the retarding plates assembled in place.

Fig. 7 is a view of the retarding plates disassembled from the remaining clutch parts.

Fig. 8 is a perspective ol the operating spindle.

Fig. 9 is an edge view of one of the retarding plates.

.This window regulator is of the chain type shown in the prior patent to Lawrence and Allmand No. 1,317,150 dated Sept. 30, 1919. This patent describes the chain tensioning device, which crnnprises the lower sprocket support a, which has a pair of trunnioirlik'o ends 7) and c that engage in struck-out portions c and d of the vertical strap iron f that connects the upper and lower sprockets. The lower sprocket wheel h is jonrnalcd on a stud '5 'irojocting From this 51: ppm"; (1.. This support a is pro iected downwardly by the coil spring j which con stitutes a chain tcnsioning spring and ordinarily keeps the chain taut. Ry rcasonof the trunnion like ends of the hearing support the lower sprocket may roclcslightly to accommodate itself to the nppc r sprocket to prevent the chain from running oti' the sprocket teeth.

In prior patent to Simpson. Schmidt. and Carstens No. 1.343.410 of'Jtine 15., 1920, the main features of the clutch here shown are described and claimed in that patent there is described and claimed i clutch which looks when the turning eftor is applied from the driven parts of the window regulator but which is free to turn when the turning effort is applied from the driving parts of the regulator. To be niii re specific, k is a cam which is provided with inclines I so that,whcn the cam is turned in either direction by efiort applied to the driven parts of the regulator, these inciines 1.. which are four in number-,creep in under the disks m and jam these out against the wall of the clutch casing in. This effectively locks the clutch elements from any effort applied by the driven parts of the regulator. for the cam is is connected by the pins 0 with the pinion (Fig.2.) This pinion g is in mesh with the larger gear r which engages under the coun terbalancing spring 8.

This larger gear is driving plate and connected by a suitable hollow spindle l0 and bolt IL with a chain sprocket t (Fig. 3) on the opposite side of the upper supporting plate to. Around this upper sprocket, which is the driving sprocket, runs the chain '0, which, asalready explained, runs also over the lower sprocket h. The window lifting pin to is provided on one of the links of the chain to engage in a sash plate a: in a familiar way that need not here be detailed.

Now turning to Fig. 6, it will be seen that the operating spindle y (detailed in Fig. 8) is provided with an integral key 2 that fits between the flanges l on the two retarding plates 2. The right hand flange 1 is at tache'd to the left hand retarding plate 2 and the left hand flange 1 is attached to the right hand retarding plate 2'(see Fig. 7). Hence when turning effort is exercised on the spindle 7 the key 2 first spreads the flanges 1 and hence draws in the retarding plates. Each of these retarding plates is provided with a slot 12 which is guided on the struck-out lug 13 of the cam is. Hence the retarding plates 2 can only move perpendicular to the major axis of the cam. Hence when turning effort is exercised upon the crank handle which is part of the driving parts of the regulator) the .retarding plates hold the rolling members or disks or; from. being thrust out against the wall of the casing to look the clutch. Of course, as long as the drivingefl'ort of the driving parts is greater than the resistance in therein, there is no tendency for the clutch parts to lock. This is the action of the clutch described and claimed in the prior Simpson, Carstens and Schmidt patend-where no retarding plates are used but a single solid driving plate.

The operation of same type of clutches and the clutch in the prior Simpson. Carstens and Schmidt patent is such that when a heavy resistanceis met, as, for instance. when the chain tensioning spring becomes collapsed, then the cam will start rotating in the opposite direction immediately the dead point of resistance has been met and the effort on the handle falters in the least. Any movement of the cam reversely. although very small, locks the clutch in the Simpsoifee al. clutch, thrusts the disks orlocking pieces outward and locks the regulator. This, of course, leaves the one run of the-chain slack'. 1

The action of the composite driving plate which comprises the two retarding plates and the springs 4 which tend to spread them, is as follows: The driving action due to the actuation by the driving parts of the regulafor is substantially thesame as in the Simpson, Carstens and Schmidt clutch. However, the flat springs 5 which engage over the ends of the cam yieldingly hold the disks or looking pieces always in contact with the thereby avoid any objeqtionable clicking or noise. When the clutch parts reach a dead point of resistance as when the sash has reached the bottom of the well and the chain tensioning spring 7' has been completely collapsed, the operation of the clutch difi'ers quite materially from the action of the revious clutch of the Simpson, Carstens and gchmidt patent. Assuming the exact dead point of resistance has been reached and turning effort on the handle falters or is released, now of course, the chain tensioning spring j tends to reversely rotate the same. This, as we have seen in the old Simpson, Carstens and Schmidt clutch, im-

mediately locked the clutch. This is not so in this clutch'for here the retarding plates preclude any such locking until they have been spread. The reason for this is that the retarding plates, by means of the slots 12 on the lugs or the keys 13, are tied to the "cam to rotate with it. Hence the reverse movement of the cam simply tends to reversely rotate the retarding plates or the composite driving plate. The locking disks or rolling members are simply carried along in a reverse direction but in no way projected out to lock the clutch parts. However, the turning effort having been released upon the crank handle and hence the key 2, the small and weak springs 4 are free to bring back the flanges 1 againstthe sides of the key and at the same time spread the retarding plates. lVhen the retarding plates are spread then the locking disks or rolling members are free to be thrust out. After they have been thrown out or thrust out by the ends of the springs 5, they meet friction on the inside of the casing and cease to rotate with the cam. The inclined surface l of thecam then drives in under the disk and locks the clutch parts by jamming the disks in between the cam and the cylindrical Wall of the casing. Hence when no effort is exercised on the crank handle the retarding plates are expanded and permit any movement in either direction of the cam to jam the inclines in under the balls and lock the clutch parts.

As I understand the action of this apparatus, the weak springs 4 that spread the retarding plates act slower than the strong chain tensioning spring Consequently the sprirm j snaps the chain back to its normal position before the retarding plates release the clutch, permitting it to lock. The result is that this clutch never looks when there is slack in the chain due to the collapsin of the chain tensio-ning spring. The retar ing plates prevent this.

It willbe apparent from the above description that a new combination of mechanical elements has been worked out, to wit: the sprockets, the endless chain, the collapsible chain tensioning spring, the clutch which in its natural action will lock before the chain tensioning, spring will take the slack out of the chain and a corrective element which is inserted in the clutch for the purpose of delayin the clutch action and coordmatin it wit the chain tensioning spring. 0 far as this broad combination is concerned, it makes no difference what is the specific character of the clutch and the corrective element. The corrective element will nlaturl'lally have to vary with the nature of the c utc I have claimed the clutch per se together with the retarding plates in a separate a plication No. 588,328 for it is conceivabe that a clutch with a retarded locking action may be useful in other connections and it also transpires that the retarding pr driving plates in this specific clutch are useful in taking up the lost motion in the handle regardless of what kind of a driving member or driving connection is used.

What I claim is:

In a window regulator, the combination of a pair of rotatable members, one of which is slidably supported, an endless flexible draft member runnin I overthe rotatable members, and arrange for connection with the window, means for yieldingly forcing said slidable rotatable member outwardly to tension the flexible draft member, and means for rotating one of said rotatable members including a clutch which, if uncontrolled locks before the draft-tensioning means can return the draft member to taut relation after the draft-tensioning member has been collapsed by continued driving effort on the rotating member after the window has been stopped. the said clutch provided with devices for retarding the=clutch action so that the clutch only looks after ing means has returned the flexible dr member to taut relation. a

In testimony whereof I affix my signature.

ERNEST E. HEINTZ.

the draft-tensi u 

